12Procedure Observe Safety! Mount Specimen Turn on grinderPrepare camera and turn off lightsSwing mounting arm into grinding positionStand back roughly 4 foot and take six picturesReturn mounting arm to non-grinding positionTurn light on and align pattern density cardTake two readings, a 10 second and 30 second blast on separate cardsTurn grinder offMeasure the force applied to grinding wheelRecord measurementsUpload photos using Image J software and record data